Sony KDL-40V2500 inverter transf. question

[tibimakai]

I have found this transformer's secondary with a much higher value then the rest of the transformers(3.6K rest and this one at 27k).
I have ordered one(used) from plazmafix.com(the only one that I have found on the net) and I can't measure the 3.6k resistance at the secondary out of the circuit.
It could be that I have got a bad one or the other ones would measure the same way out of the circuit?
I would like to be sure if this part is defective or not before I complain about it.
I have posted some pictures. Do you guys agree with me that between the circled pins is the secondary winding?

[tom66]

Re: Sony KDL-40V2500 inverter transf. question

It does look like the secondary. And on the other trafos, you were getting 3.6k between those pins? I imagine these transformers are pulls from scrapped boards as there would otherwise be no source for them.

[Rtech]

Re: Sony KDL-40V2500 inverter transf. question

It certainly looks right,BUT, I would take out one of your good ones and then retest...better safe than sorry...

[tibimakai]

Re: Sony KDL-40V2500 inverter transf. question

Yes, on the rest of them I'm getting 3.6Kohm.
I was thinking of removing one, but on the secondary side it's nothing connected except two "blue" round capacitors.
If those two pins are the secondary, it should measure something right? It shows OL.

[selldoor]

Re: Sony KDL-40V2500 inverter transf. question

Do the transformers have a part number?. Checked the pin for Lacquer.
Can you try and get a reading on the actual wire instead of the pin just in case its just
not connected. Again you would need to scrape off the lacquer - very carefully!!

[budm]

Re: Sony KDL-40V2500 inverter transf. question

I wonder when that transformer was removed from the board and sold it to you, they were not being careful when they removed it from the board, as you can see, the wire on the secondary side is VERY FINE wire.

[tibimakai]

Re: Sony KDL-40V2500 inverter transf. question

Good point on testing the wires them selfs. The pins on the traf. were all bent when I have received it. Maybe the wires are broken off from the pins because the Lacquer doesn't allow any sliding of the wires.
The part number is A841. There are these numbers on one end of the traf and some others on the other end. The A841 matches, but the other ones are not, I hope they don't matter. The traf designation I have seen on the net it was mentioned only as a A841.
I will look more closely and report back.

[tibimakai]

Re: Sony KDL-40V2500 inverter transf. question

TV is running, yeahh!
I made a mistake assuming that those two pins were the secondary winding pins.

[budm]

Re: Sony KDL-40V2500 inverter transf. question

But those two pins on the top are connected to the Ballast caps on your board, I can see the traces running to the transformer in your picture, NO? It has two secondary windings on the side and primary windings in the middle section?

[tibimakai]

Re: Sony KDL-40V2500 inverter transf. question

The way initially I circled the pins were no reading at all. This way shows 1.1Kohm both ways and when soldered all in, shows at the connector 3.6Kohm.


Bud, could you please look at the 40" Samsung TV that I have just posted? What is your opinion about it? Mainboard, capacitors?
Most likely I will have to go pick it up any moment now.